Our Location                                                                           Office Phone

3230 Industrial Way, SW | Suite B | Snellville, GA 30039       (800) 474-2490



We offer an array of single-parameter water quality field meters that allow your team to test one specific parameter, whether you’re measuring dissolved oxygen or field turbidity. Our selection includes devices with various advanced features including waterproofed design, a built-in calibration chamber, an enlarged digital display and more – we have the single-parameter field meters you need to get the job done right.

For questions about our products, call our experienced team at 1-800-474-2490 or request a quote for your next order. You can also browse our full selection of hand-held water quality testers!

Dissolved Oxygen Meters: YSI 55
Availability: In Stock

Features a built-in calibration chamber and push-button calibrations. Provides direct salinity, altitude and automatic temperature compensation. Select cable length or select the detachable cable option.

Dissolved Oxygen Meters: YSI 550A
Availability: In Stock

The 550A also has a built-in calibration chamber, low-battery indicator, direct salinity, and altitude compensation. It will calibrate in % or mg/L saturation and displays temperature in user selected degrees C or F. The DO electrode is easily field replaceable, and the replacement membranes are built into screw-on caps. Battery life is rated at 2,000 hours. Special 3-year warranty on meter and 1-year warranty on sensor.